Runway calculator
How many months your cash lasts, when it runs out, and whether you reach profit first.
Simple runway
12.5 months
$40,000 net burn a month
With growth
Cash runs out in month 13
Lowest balance $0
You are default dead. At these rates the money runs out first, so cut burn, grow faster or plan the raise now.
How it works
- Each month, revenue and expenses grow by the rates you set, and the difference is added to or taken from your cash.
- Simple runway ignores growth and just divides today's cash by today's net burn.
- Growth-adjusted runway follows the month-by-month projection until cash goes below zero, or until revenue covers expenses.
- Everything runs in your browser. Nothing you type is sent anywhere.
Frequently asked questions
What is startup runway?
Runway is how many months your company can keep operating before the cash in the bank runs out, at the rate you are currently losing money. It is cash divided by net monthly burn, which is expenses minus revenue.
What does default alive mean?
The term comes from Paul Graham's 2015 essay 'Default Alive or Default Dead?'. A startup is default alive if, at its current revenue growth and expenses, it reaches profitability before the money runs out, and default dead if it would need to raise more to survive.
How much runway should a startup have?
A common rule of thumb is to raise enough for 18 to 24 months, and to start the next raise with at least six months left, because closing a round often takes several months. Treat it as a starting point, though. A company growing quickly towards profit can run leaner than one that depends on the next round.